Guidance Portal

The Bureau of Ocean Energy Management (BOEM) has established this guidance portal in compliance with Executive Order 13891 of October 9, 2019, entitled Promoting the Rule of Law Through Improved Agency Guidance Documents. By February 28, 2020, all BOEM guidance documents remaining in effect may be found on this portal. Guidance documents lack the force and effect of law, unless expressly authorized by statute or incorporated into a contract. BOEM may not cite, use, or rely on any guidance that is not posted on this website, except to establish historical facts.

If you have questions or comments regarding any of BOEM's guidance documents -- including requests to withdraw or modify specific guidance, please email OfficeofRegulations@boem.gov.

Archived information can also be found at Archived Guidance and Archived Notices To Lessees And Operators.

Document Name

Original Issue Date

Date added to this portal

BOEM Unique Identifier

Topic

Content/Summary

Expanded Rice’s Whale Protection Efforts During Reinitiated Consultation with NMFS

Expanded Rice’s Whale Protection Efforts During Reinitiated Consultation with NMFS BOEM NTL No. 2023-G01 - Fact Sheet

08-17-2023 08-21-2023 BOEM NTL No 2023-G01 Expanded Rice’s Whale Protection Efforts
During Reinitiated Consultation with NMFS
This Notice to Lessees and Operators (NTL) was developed to provide recommendations and guidance for lessees and operators regarding suggested measures to expand protections for the Rice’s whale, during the period when the Bureau of Ocean Energy Management (BOEM) and the Bureau of Safety and Environmental Enforcement (BSEE) are engaged in reinitiated consultation with the National Marine Fisheries Service (NMFS) on the 2020 Biological Opinion, as amended (2020 BiOp).  
2023 OCS Emissions Inventory Western and Central Gulf of Mexico and Adjacent to the North Slope Borough of the State of Alaska 10-01-2022 09-20-2022 BOEM NTL No 2022-N01 2023 OCS Emissions Inventory BOEM is issuing this NTL to instruct lessees and operators about the activity information and related emissions source data they should collect and submit for use in the 2023 Outer Continental Shelf (OCS) Emissions Inventory.
Shallow Hazards Survey and Evaluation for OCS Exploration and Development Drilling (Alaska OCS) 10-01-2022 09-09-2022 BOEM NTL No. 2022-A01

Shallow Hazards Surveys

This NTL provides guidance for shallow hazards geophysical surveys, evaluations and reporting procedures for the BOEM Alaska Regional Office.
Shallow Hazards Program (Gulf of Mexico OCS) 10-01-2022 09-09-2022 BOEM NTL No. 2022-G01 Gulf of Mexico shallow hazards program This NTL notifies lessees, operators and pipeline ROW holders of the GOM shallow hazards program and describes the surveys, reports, analyses, and mitigations needed to minimize risk to human life and the environment.

BOEM’s Approved Air Quality Models

10-01-2020

10-01-2020

BOEM NTL No. 2020-N02

BOEM’s Approved Air Quality Models

This NTL informs lessees and operators of the approved air quality models that should be used for air quality assessment in the areas that BOEM regulates on the Outer Continental Shelf (OCS).

2021 OCS Emissions Inventory - Western Gulf of Mexico (GOM) and Adjacent to the North Slope Borough of the State of Alaska

10-01-2020

10-01-2020

NTL No. 2020-N03

2021 OCS Emissions Inventory 

This NTL instructs lessees and operators about the emissions source data and reports they should submit for use by BOEM in preparing the 2021 OCS Emissions Inventory.   

Air Quality Information Requirements for Exploration Plans, Development Operations Coordination Documents, and Development and Production Plans in the GOM Region 

10-01-2020

10-01-2020

NTL No.  2020-G01

Air Quality Information Requirements for Exploration Plans, Development Operations Coordination Documents, and Development and Production Plans 

This NTL provides guidance to facilitate lessees’ and operators’ submittal of necessary emissions information to facilitate BOEM’s timely review of Exploration Plans, Development Operations Coordination Documents and Development and Production Plans in the GOM Region. 

Air Dispersion Modeling Information for Exploration Plans, Development Operations Coordination Documents, and Development and Production Plans 

10-01-2020

10-01-2020

NTL No.  2020-G02

Air Dispersion Modeling Information for Exploration Plans, Development Operations Coordination Documents, and Development and Production Plans

This NTL describes how to conduct dispersion modeling in the areas of the GOM where BOEM has air quality jurisdiction.

Reporting of Air Emissions in Exploration Plans and Development and Production Plans – Alaska OCS 

10-01-2020

10-01-2020

NTL No. 2020-A01

Reporting of Air Emissions in Exploration Plans and Development and Production Plans 

This NTL provides guidance for lessees and operators on submittal of necessary emissions information to facilitate BOEM’s timely review of Exploration Plans and Development and Production Plans in the Alaska Region. 

Air Dispersion Modeling Information for Exploration Plans and Development and Production Plans – Alaska OCS

 

10-01-2020

10-01-2020

NTL No. 2020-A02

Air Dispersion Modeling Information for Exploration Plans and Development and Production Plans

This NTL provides air dispersion modeling guidance applicable to lessees’ and operators’ activities on areas of the Alaska OCS where BOEM has air quality jurisdiction.  

Procedure for Change of Existing and New Operator Oil and Gas Program 07-05-2017 02-28-2020   Procedure for Change of Existing/New Operator for the Oil and Gas program in the Pacific OCS. Guidance on Change of Existing/New Operator of Leases in the Pacific OCS Region. Updated July 5, 2017.
Implementation of Seismic Survey Mitigation Measures and Protected Species Observer Program 09-30-2016 06-19-2020 NTL-2016-G02 Seismic Surveys and Protected Species Observers This NTL clarifies that after March 13, 2020, the mitigation measures included in Appendix A of the National Marine Fisheries Service’s 2020 Biological Opinion will be applied in place of this NTL.
Vessel Strike Avoidance and Injured/Dead Protected Species Reporting 08-30-2016 06-19-2020 NTL-2016-G01 Vessel strike mitigation measures to reduce impacts on ESA-listed species This NTL clarifies that after March 13, 2020, the mitigation measures included in Appendix C of the National Marine Fisheries Service’s 2020 Biological Opinion will be applied in place of this NTL.
Remotely Operated Vehicle (ROV) Investigations of Unidentified Magnetic Anomalies and/or Side-Scan Sonar Targets: Methodological Guidelines 10-01-2015 02-28-2020   Remotely Operated Vehicle (ROV) Investigations of Unidentified Magnetic Anomalies and/or Side-Scan Sonar Targets: Methodological Guidelines These guidelines are used for determining National Register eligibility of potential resources in deep water.
Procedures and Requirements for Right-of-Use and Easement Requests for Platforms, Artificial Islands, Installations and Other Devices Attached to the Seabed 09-08-2015 02-28-2020 NTL-2015-N06 Procedures and Requirements for Right-of-Use and Easement (RUE) Requests This NTL clarifies policy on requirements for RUE requests.to construct and maintain platforms, artificial islands, installations and other devices permanently or temporarily attached to the seabed.
General Financial Assurance 08-17-2015 02-28-2020 NTL-2015-N04 General bond (financial assurance) requirements This NTL clarifies BOEM’s implementation of the requirements for general financial assurance applicable to oil and gas, and sulphur leases, pipeline rights-of-way (ROW) and right-of-use-and-easement (RUE) grants and a specific type of permit issued by BOEM.
Limitations on Credit Card Collection Transactions and Policy for Splitting Transactions 07-22-2015 02-28-2020 NTL-2015-N03 Maximum dollar amount allowed for a credit card transaction and policy on splitting transactions Maximum dollar amount allowed for a credit card transaction and policy on splitting transactions
Elimination of Expiration Dates on Certain Notices to Lessees and Operators Pending Review and Reissuance 02-06-2015 02-28-2020 NTL-2015-N02 Elimination of expiration dates on NTLs This NTL eliminates expiration dates of NTLS posted on the BOEM website as of February 6, 2015.
Information Requirements for Exploration Plans, Development and Production Plans, and Development Operations Coordination Documents on the OCS for Worst Case Discharge and Blowout Scenarios 01-14-2015 02-28-2020 NTL-2015-N01 Information Requirements for EPs, DOCDs and DPPs. This NTL provides that EPs, DOCDs and DPPs that include a drilling activity must include a blowout scenario. All plans must include information on potential oil spills and calculations of the worst case discharge scenario.
Frequently Asked Questions Information Sheet for Information Requirements for Exploration Plans, Development and Production Plans, and Development Operations Coordination Documents on the OCS for Worst Case Discharge and Blowout Scenarios 01-14-2015 02-28-2020 NTL-2015-N01 FAQ Frequently Asked Questions on NTL-2015-N01 This FAQ guidance document contains frequently asked questions and answers concerning NTL No. 2015-N01.
Designation of Operator of an OCS Oil and Gas or Sulphur Lease 11-20-2013 06-19-2020 NTL-2014-G02 Designation of Operator (DOO) for an OCS oil and gas or sulphur lease. This NTL provides guidance on how and when to create or change a DOO that involves record title or operating rights to a lease, or an individual well or multiple wells.
Bottomhole Pressure Surveys 05-01-2013 06-22-2020 NTL-2013-P01 Bottomhole Pressure (BHP) Surveys in the Pacific OCS Region. This NTL provides guidance on BHP surveys in the Pacific OCS Region.
Well Producibility Determinations 03-01-2013 06-19-2020 NTL-2013-G01 Requests for well producibility determinations This NTL provides guidance on how to request a well producibility determination for wells drilled in the Gulf of Mexico OCS.
Electronic Submittal of Company, Qualification, Financial Assurance, and Bonding Information and Documents 06-06-2012 02-28-2020 NTL-2012-N01 Electronic submittal of documents This NTL establishes procedures for electronic submittals and waiver of requirement for corporate seal for documents submitted electronically.
Guidance for Compliance with Mitigation 3.20 Avoidance of Archaeological Resources 09-16-2012 02-28-2020 Standard Mitigation 3.20 Guidelines for complying with a condition of approval Allows operator’s plan to be approved before survey is submitted to document absence of archaeological resources
Biologically-Sensitive Underwater Features and Areas 01-27-2010 02-28-2020 NTL-2009-G39 Shallow water (<300 m) biologically sensitive habitat features This NTL provides operators with clarification regarding topographic feature and Pinnacle Trend lease stipulations, and implementation of mitigation measures around other shallow water hard bottom features.
Deepwater Benthic Communities 01-27-2010 02-28-2020 NTL-2009-G40 Deepwater (>300 m) Benthic Communities This NTL provides operators clarification on the type of information needed to review for deepwater benthic habitats and communities and implementation of mitigation measures.
Change of Ownership/Operatorship of Leases and Pipelines 12-18-2009 02-28-2020 NTL-2009-P06 Changes of ownership/operatorship of leases and pipelines in the Pacific OCS Region. This NTL provides guidance on changes of ownership/operatorship of leases and pipelines in the Pacific OCS Region
Air Quality Jurisdiction on the OCS 12-04-2009 06-19-2020 NTL-2009-N11 Division of air quality jurisdiction on the OCS between BOEM and EPA. This NTL clarifies that BOEM regulates air quality for facilities on the OCS in the area of the Gulf of Mexico west of 87°30'W longitude and in the area offshore of the North Slope Borough of Alaska.
Ancillary Activities 12-01-2009 06-19-2020 NTL- 2009-G34 Ancillary activities in the Gulf of Mexico OCS This NTL provides guidance on conducting ancillary activities, including notifications and what activities will require an OCS plan.
Appeals 11-20-2009 02-28-2020 NTL-2009-N12 Appeals of BOEM decisions or orders. This NTL clarifies the procedures to use to appeal any decision or order issued by BOEM.
MMS Policy on Refund Requests for Service Fees 11-01-2009 02-28-2020 NTL-2009-N09 Requests for refunds of service fees. This NTL clarifies BOEM policy and provides instructions on refund requests for service fees.
U. S. Air Force Communication Towers 09-09-2009 06-23-2020 NTL-2009-G26 U.S. Air Force Communications Towers in the Gulf of Mexico OCS. This NTL provides the X and Y coordinates for Air Force communication towers located in the Gulf of Mexico OCS and guidance concerning operational restrictions near the towers.
Submitting Exploration Plans and Development Operations Coordination Documents 09-09-2009 02-28-2020 NTL-2009-G27 Revising Exploration Plans (EPs) and Development Operations Coordination Documents (DOCDs) This NTL clarifies the policy for revising EPs and DOCDs in the Gulf of Mexico.
Significant OCS Sediment Resources in the Gulf of Mexico 01-27-2009 02-28-2020 NTL-2009-G04 Avoidance and protection of significant OCS sediment resources This NTL provides guidance for the avoidance and protection of significant OCS sediment resources essential to coastal restoration initiatives in the Gulf of Mexico OCS Region.
Guidelines for Oil Spill Financial Responsibility (OSFR) for Covered Facilities 08-26-2008 02-28-2020 NTL-2008-N05 Oil Spill Financial Responsibility (OSFR) This NTL provides policies and procedures for submitting OSFR documents for covered facilities.
Information Requirements for Exploration Plans and Development Operations Coordination Documents 05-01-2008 02-28-2020 NTL-2008-G04 Information requirements for Exploration Plans (EPs) and Development Operations Coordination Documents (DOCDs) This NTL provides additional guidance on the information included in submitted plans to meet the requirements to comply with BOEM regulations. The NTL also helps provide guidance on information necessary for BOEM to ensure activities comply with the Endangered Species Act.
Water Quality Spreadsheets (2 spreadsheets) 08-22-2019 02-28-2020   Assist with preparation of Plans that follow NTL 2008-G04 These two spreadsheets may be used to replace the six tables requested in NTL-2008-G04.
Archaeological Survey and Report Requirements 10-16-2006 02-28-2020 NTL-2006-P03 Archaeological survey and report requirements for the Pacific OCS Region This NTL provides guidance on archaeological surveys and report requirements for the Pacific OCS Region.
Biological Survey and Report Requirements 10-16-2006 02-28-2020 NTL-2006-P02 Biological survey and report requirements for the Pacific OCS Region This NTL provides guidance on biological surveys and report requirements for the Pacific OCS Region.
Shallow Hazards Survey and Evaluation for Alaska Outer Continental Shelf (OCS) Pipeline Routes and Rights-of-Way 07-25-2005 02-28-2020 NTL-2005-A02 Shallow hazards surveys and evaluations in the Alaska OCS Region. This NTL provides guidance for conducting pipeline ROW shallow hazards geophysical evaluations, surveys and reporting in the Alaska OCS Region.
Diver Evaluation of Unidentified Magnetic Anomalies and/or Side-Scan Sonar Targets: Search and Methodological Requirements 08-18-2000 02-28-2020   Guidelines for complying with a condition of approval if operator is unable to avoid a potential archaeological resource These guidelines are used for determining National Register eligibility of potential resources in shallow water.

Archaeological Resource Reports and Surveys

07-01-2005 06-25-2020 NTL-2005-G07 Archaeological resource reports and archaeological surveys in the Gulf of Mexico OCS. This NTL clarifies when BOEM may require an archaeological resource report and provides recommendations on how to prepare such a report and conduct archaeological surveys.

Archaeological Survey and Evaluation for Exploration and Development Activities

07-25-2005 06-24-2020 NTL-2005-A03 Archaeological resource reports and archaeological surveys in the Alaska OCS. This NTL clarifies when BOEM may require an archaeological resource report and provides recommendations on how to prepare such a report and conduct archaeological surveys.

Document Name

Original Issue Date

Date added to this portal

BOEM Unique Identifier

Topic

Content/Summary

Gulf of Mexico Environmental Consultations   05-16-2023   Section 106 requires that a Federal agency consider the effects of its actions on properties eligible for listing to the National Register of Historic Places.  Section 110 requires a Federal agency to document and interpret archaeological resources that may be affected by its actions. BOEM fulfills its Section 106 responsibilities by requiring operators to conduct pre-disturbance remote sensing surveys and avoid areas that are indicative of historic or prehistoric archaeological properties.
Managing Multiple Uses in the Gulf of Mexico   02-28-2020   Gulf of Mexico Lease Blocks with Significant Sediment Resources Gulf of Mexico Lease Blocks with Significant Sediment Resources to reference when submitting Exploration and Development Plan
Model Decommissioning Trust Agreement   02-28-2020   Model Decommissioning Trust Agreement Model Decommissioning Trust Agreement

Document Name

Original Issue Date

Date added to this portal

BOEM Unique Identifier

Topic

Content/Summary

Guidelines for Providing Geophysical, Geotechnical, and Geohazard Information Pursuant to 30 CFR Part 585 10/17/23 TBD   Recommendations for geophysical, geotechnical and geohazard data These guidelines contain recommendations for acquiring geophysical, geotechnical and geohazard information needed for BOEM's technical review.
Guidelines for Submission of Geospatial Data for Offshore Renewable Energy Development 09-27-2023 09-28-2023 JOINT NTL No. 2023-N03 Spatial Data

The joint BOEM-BSEE NTL provides information and guidance for all submissions of geospatial data, maps, and diagrams for renewable energy activities occurring on the Outer Continental Shelf (OCS). It is intended to standardize guidelines regarding visual and digital data submission formats, and also meant to expand the guidance to areas other than the Atlantic region.

Guidance on Information Needed for Issuance of a Notice of Intent (NOI) Under the National Environmental Policy Act (NEPA) for a Construction and Operations Plan (“NOI Checklist”) 08-03-2023 08-03-2023   Guidelines and Instructions for COP submissions This guidance, known as the “NOI Checklist,” revises the current recommended process for COP submissions to: 1) provide clarity to lessees; 2) establish a pre-application and pre-NOI process with lessees and cooperating agencies that will benefit all stakeholders; 3) improve the efficiency of proposed offshore wind project reviews by avoiding delays to the NEPA analysis after the NOI has been published. The revised process identifies the threshold requirements for information that should be included in a COP submission before BOEM will formally initiate the EIS through publication of an NOI.
BOEM Nationwide Recommendations for Impact Pile Driving Sound Exposure Modeling and Sound Field Measurement for Offshore Wind Construction and Operations Plans (“Marine Acoustic Modeling and Measurement Guidelines”)  08-03-2023 08-03-2023   Guidelines and Instructions for COP submissions This document comprises two sections. The first section aims to provide general recommendations to lessees as they develop the acoustic and exposure models of impact pile driving to be included with their COP submittals prior to issuance of a Notice of Intent to prepare an Environmental Impact Statement. The second section provides recommendations for SFV measurements to verify anticipated sound fields after COP approval.
Draft Guidelines and Instructions for Progress Report Required by BOEM New York Bight Leases (OCS-A 0537-0544) and Carolina Long Bay Leases (OCS-A 0545-0546) 04-10-2023 04-10-2023       
Guidelines and Instructions for Progress Report Development
This guidance provides considerations for lessees of the New York Bight Leases (OCS-A 0537– 0544) and Carolina Long Bay Leases (OCS-A 0545–0546) (Lessees) when satisfying the progress reporting lease stipulation that the Bureau of Ocean Energy Management (BOEM) has recently included in offshore renewables leases issued under Section 8(p) of Outer Continental Shelf (OCS) Lands Act.

Draft Guidelines and Instructions for Native American Tribes Communications Plan Development Required by BOEM New York Bight Leases (OCS-A 0537–0544) and Carolina Long Bay Leases (OCS-A 0545–0546)

02-06-2023 02-10-2023   Guidelines and Instructions for Native American Tribes Communications Plan Development

This guidance provides considerations for lessees of the New York Bight Leases (OCS-A 0537– 0544) and Carolina Long Bay Leases (OCS-A 0545–0546) (Lessees) when satisfying the Native American Tribal Communications Plan (NATCP) lease stipulation that the Bureau of Ocean Energy Management (BOEM) has recently included in offshore renewables leases issued under Section 8(p) of Outer Continental Shelf (OCS) Lands Act.

Reorganization of Title 30—Renewable Energy and Alternate Uses of Existing Facilities on the Outer Continental Shelf into 30 CFR Parts 285, 585, and 586 01-17-2023   JOINT NTL No. 2023-N01 Reorganization of the Outer Continental Shelf renewable energy regulations between BOEM and BSEE This NTL provides information and guidance regarding the reorganization of the Outer Continental Shelf renewable energy regulations between BOEM and BSEE. That reorganization was announced in the final rule entitled “Reorganization of Title 30—Renewable Energy and Alternate Uses of Existing Facilities on the Outer Continental Shelf,” which was published in the Federal Register on January 31, 2023, (88 FR 6376).
Guidelines for Lighting and Marking of Structures Supporting Renewable Energy Development 04-28-2021 04-28-2021   Guidelines for Lighting and Marking of Structures Supporting Renewable Energy Development BOEM has posted its final guidelines for lighting and marking of structures supporting offshore wind energy projects. These guidelines promote safe navigation in the air and on the sea and mitigate harm to life, natural resources, and the environment.
BOEM / FERC Guidelines on Regulation of Marine Hydrokinetic Energy Projects on the OCS 05-27-2020 06-05-2020   Marine and Hydrokinetic energy (MHK) projects. These guidelines provide information on the process of obtaining an MHK lease and license for projects on the OCS. BOEM has jurisdiction to issue leases while FERC has jurisdiction to issue licenses for the same projects.
Filing Applications for Renewable Energy Leases, Grants, and Alternate Use Grants on the Outer Continental Shelf 05-27-2020 06-05-2020 NTLA-No-REN-N03 Filing addresses for applications. This NTL updates the areas covered and the office address of each BOEM Regional Office where applicants should file for renewable energy leases and grants and alternate use grants on the U.S. OCS.
Guidelines for Activities Requiring Authorization for Renewable Energy Development on the Outer Continental Shelf 05-27-2020 06-05-2020   Renewable energy activities requiring authorization These guidelines explain what activities relating to the development of wind, wave and ocean current resources require a lease, easement or right-of-way issued by BOEM.
Guidelines for Providing Archaeological and Historic Property Information 05-27-2020 06-05-2020   Archaeological Properties Identification These guidelines contain recommendations on effective methods for identifying historic properties.
Guidelines for Providing Avian Survey Information for Renewable Energy Development on the Outer Continental Shelf 05-27-2020 06-05-2020   Avian Surveys These guidelines contain recommendations for complying with avian information requirements.
Guidelines for Providing Geophysical, Geotechnical, and Geohazard Information 05-27-2020 06-05-2020   Geological and geophysical, geotechnical and geohazard information. These guidelines contain recommendations for acquiring geophysical, geotechnical and geohazard information.
Guidelines for Providing Information on Fisheries Social and Economic Conditions for Renewable Energy Development on the Atlantic Outer Continental Shelf 05-27-2020 06-05-2020   Information on Fisheries Social and Economic Conditions These guidelines contain recommendations for complying with information requirements enabling full consideration of the social and economic impact to fishery stakeholders.
Information Guidelines for a Renewable Energy Construction and Operations Plan (COP) 05-27-2020 06-05-2020   Construction Operation Plan (COP) These guidelines contain recommended information to submit for a COP describing proposed activities and planned facilities to be constructed and used for projects under commercial leases.
Qualification Guidelines to Acquire and Hold Renewable Energy Leases and Grants and Alternate Use Grants on the U.S. Outer Continental Shelf 05-27-2020 06-05-2020   Qualifications These guidelines contain recommendations to qualify for and hold renewable energy leases and grants and alternate use grants on the OCS, and list the documentation lessees and grantees are to submit to BOEM for a qualification determination.
Draft Proposed Guidelines for Providing Information on Lighting and Marking of Structures Supporting Renewable Energy Development 10-24-2019 02-28-2020   Lighting and Marking of Renewable Energy Structures on the OCS These guidelines contain recommendations regarding lighting and marking design for wind energy facilities, and outline the types of information that BOEM requests from lessees as part of their SAP, COP, or GAP, as applicable.
Guidelines for Providing Information on Marine Mammals and Sea Turtles for Renewable Energy Development on the Atlantic OCS 06-19-2019 02-28-2020   Marine Mammal Surveys These guidelines contain recommendations for acquiring information characterizing marine mammal and sea turtle distribution and abundance.
Guidelines for Providing Information on Fisheries for Renewable Energy Development on the Atlantic OCS 03-27-2023 02-28-2020   Fisheries Surveys These guidelines contain recommendations for obtaining baseline information on key fishery species and habitat within a survey area.
Guidelines for Information Requirements for a Renewable Energy SAP 06-19-2019 02-28-2020   Site Assessment Plan (SAP) These guidelines contain information requirements for an SAP for OCS renewable energy activities on commercial leases.
Guidelines for Providing Benthic Habitat Survey Information for Renewable Energy Development on the Atlantic OCS 06-19-2019 02-28-2020   Benthic Habitat Surveys These guidelines contain recommendations for acquiring information to characterize benthic habitats within a survey area affected by proposed operations.
Draft Design Envelope Guidelines 01-12-2018 02-28-2020   Design Envelope These guidelines contain recommendations for lessees opting for a PDE permitting approach in their COP.